Well, the situation is quite simple, I have a Nintendo DS Lite and a R4 original version and use it without problems a thousand years.

Then I got a Nintendo DSi with R4i Advance, download the latest firmware upgraded everything right and spent my Pokémon Platinum and the ".sav" file from R4 to R4i Advance. But the problem is: no matter what I do, it seems that R4i Advance can not read ".sav" file of Pokémon Platinum and ALWAYS load the game, start a New Game I can't load the ".sav" file, the stranger that even I passing. sav back to the R4 on my Nintendo DS Lite, it opens normally and load the game where it left off.